CN116499414A - Angular contact ball bearing outer ring contact diameter measuring device and use method thereof - Google Patents

Abstract

The application discloses an angular contact ball bearing outer ring contact diameter measuring device and a using method thereof, wherein the measuring device comprises a measuring platform, a reference plate is arranged above the measuring platform, a main shaft is arranged on the reference plate, one end of the main shaft is provided with a measuring standard cone and a retainer, the main shaft is connected with a driving assembly, and the driving assembly can drive the main shaft to reciprocate along the central axis of the main shaft and apply a measuring load to the main shaft and can also drive the main shaft to rotate along the central axis of the main shaft; the position of the measuring platform opposite to the main shaft forms a measuring station, the measured outer ferrule is arranged on the measuring station, and the sensor component on the measuring platform can measure and display the difference value between the contact diameter value of the measured outer ferrule and the contact diameter value of the outer ferrule for calibration. Therefore, the measuring device provided by the application can measure the contact diameter of the outer ring of the bearing, can realize the direct assembly of the bearing by matching with the contact diameter of the inner ring of the bearing, ensures the contact angle of the angular contact ball bearing, and reduces the deviation between the actual contact angle and the theoretical contact angle.

Description

Angular contact ball bearing outer ring contact diameter measuring device and use method thereof

Technical Field

The application relates to the technical field of rolling bearing manufacturing, in particular to an angular contact ball bearing outer ring contact diameter measuring device and a using method thereof.

Background

The precise angular contact ball bearing is an important type of high-end precise bearing, is generally applied to a high-speed and high-precision rotary shaft system, and is used simultaneously by multiple sets, and because the bearing precision is high, the installation and the assembly are complex, and the optimal assembly state is difficult to realize by general enterprises, the bearing enterprises are required to make parameters such as the contact angle, the protruding amount and the like of the bearing consistent.

The angular contact ball bearing is a bearing commonly used in a precise shafting, and generally more than two sets of bearings are used in a combined pairing mode. The basic installation mode when the two sets of bearings are used in combination and pairing is as follows: back-to-back DB mounting (see fig. 1), face-to-face DF mounting (see fig. 2), and tandem DT mounting (see fig. 3). There are other mounting ways of the multiple bearing, taking the triple bearing as an example, fig. 4, 5 and 6 respectively illustrate several mounting ways of the triple bearing.

In order to ensure the performance quality of the shafting and exert the best performance of the bearing, when the bearing is assembled by more than two pairs, the basic requirements are as follows: (1) the point of action of the force is on the axis; (2) each set of bearings is subjected to a certain preload; (3) the stress of a group of bearings is uniform. Therefore, when the angular contact ball bearing is installed, the contact angle of the bearing is ensured to be consistent, and finally, the axial clearance is adjusted (negative clearance), the clearance value is determined according to different use conditions and cooperation, and the clearance is determined by controlling the protruding amount and the recessed amount of the end face of the bearing. Therefore, the contact angle and the protrusion of the single-set angular contact ball bearing are important technical parameter indexes, and the installation and the use of the bearing are directly affected.

The basic requirement of the paired bearings is that the protruding amount of the angular contact ball single-sleeve bearing is zero and the contact angles of the paired bearings are equal. At present, a passive coping method is generally adopted at home and abroad to meet the requirement of paired bearings. Specifically, at present, enterprises producing precise angular contact ball bearings at home and abroad generally strictly control contact angles and end face protruding amounts of finished bearings in the production process, measure the end face protruding amounts of preloaded bearings by using a protruding amount meter, determine the protruding amount, and guarantee the protruding amount of the bearings by a method of polishing the heights of bearing rings; and calculating the contact angle of the bearing according to the theoretical clearance, the groove curvature radius, the assembly spherical diameter and the like of the bearing, controlling the clearance, the groove curvature and the like of the bearing indirectly in the production process, and detecting and judging whether the contact angle of the bearing is qualified or not through a contact angle measuring instrument.

The following problems exist in controlling contact angle during production by using a passive coping method:

1. because of the deviation of the play and the deviation of the curvatures of the inner ferrule groove and the outer ferrule groove, the calculated theoretical contact angle and the actual contact angle deviate, and the full detection of the contact angle is carried out on the bearing with high requirement;

2. the theoretical contact angle is not consistent with the contact angle under preload.

Therefore, a new solution is needed to solve the problems existing in the prior art.

Disclosure of Invention

The application provides an angular contact ball bearing outer ring contact diameter measuring device and a using method thereof, which are used for solving the problem that the contact diameter of the bearing outer ring is difficult to measure in the existing bearing production process, so that the control precision of the contact angle of the bearing is low.

In order to achieve the above object, the present application provides the following technical solutions:

on one hand, the application provides an angular contact ball bearing outer ring contact diameter measuring device, which comprises a measuring platform, wherein a reference plate is arranged above the measuring platform at intervals in parallel, a main shaft is installed on the reference plate, one end of the main shaft is rotationally connected with the reference plate, the other end of the main shaft extends towards the measuring platform, a measuring standard cone and a retainer provided with a measuring ball are installed at the end of the main shaft, the main shaft is connected with a driving assembly, and the driving assembly is used for driving the main shaft to reciprocate along the central axis of the main shaft and applying a measuring load to the main shaft and is used for driving the main shaft to rotate along the central axis of the main shaft;

the measuring platform is provided with a sensor assembly for measuring and displaying the difference value between the contact diameter value of the measured outer ring and the contact diameter value of the outer ring for calibration;

the main shaft is driven by the driving assembly to approach the outer ring to be measured, the measuring standard cone and the retainer are correspondingly arranged with the outer ring to be measured, the measuring ball is abutted with the outer ring to be measured, and the measuring standard cone corresponds to the probe of the sensor assembly.

According to the technical scheme, the mounting hole is formed in the reference plate, the guide cylinder sleeve is arranged in the mounting hole, a channel allowing the main shaft to penetrate is formed in the guide cylinder sleeve, a circle of groove is formed in the inner wall of the channel, the groove forms the mounting position of the air bearing guide sleeve, one end of the main shaft penetrates through the guide cylinder sleeve and then is connected with the first end cover, an air bearing is arranged in the first end cover, the main shaft is connected with the air bearing, an air nozzle is arranged on the first end cover and used for jetting pressure air to the air bearing, and the air bearing and the main shaft rotate.

Further, the other end of the main shaft penetrates through the guide cylinder sleeve and then is connected with the measuring standard cone and the retainer; the guide cylinder sleeve is connected with a second end cover, an air bearing and an air bearing guide sleeve are arranged in the second end cover, an air nozzle is arranged on the second end cover, and the main shaft penetrates through the second end cover and then is connected with the measuring standard cone.

Further, the driving assembly comprises a driving cylinder and an air nozzle, the driving cylinder is connected with the main shaft, and the main shaft is driven by the driving cylinder to reciprocate along the guide cylinder sleeve.

Further, one end of the main shaft forms a step structure for installing the measuring standard cone and the retainer, the measuring standard cone is a round table-shaped structural member, a through hole which is installed in a matched mode with the main shaft is formed in the center position of the measuring standard cone, the retainer is installed on the outer wall of the measuring standard cone, and the retainer is used for installing and limiting a plurality of measuring balls installed on the retainer.

Further, a limiting structure is arranged at the end part of the step structure and used for limiting the installation of the measuring standard cone and the retainer.

Further, a groove is formed in the measuring station, the groove corresponds to the main shaft, and when the measuring standard cone and the retainer are arranged on the measured outer sleeve, the end part of the main shaft extends into the groove and is spaced from the bottom of the groove; the bottom of the groove forms a through hole for installing a probe of the sensor, the through hole corresponds to the end part of the main shaft, and the probe of the sensor assembly is fixedly connected with the measuring platform through a locking nut.

Further, a mounting position for mounting the protection pivot is formed on the position, close to the groove wall, of the measuring platform, and when the end part of the measuring standard cone is in contact with the surface of the measuring platform, the end part of the measuring standard cone is correspondingly connected with the protection pivot.

Further, the protective fulcrum comprises a metal screw.

Further, the central axis of the main shaft is perpendicular to the surface of the measuring platform.

Further, the measuring platform is arranged on a workbench, a plurality of stand columns are arranged on the workbench, and the stand columns are connected with the reference plate.

Further, the sensor assembly includes a sensor probe, a processor coupled to the sensor probe, and a display coupled to the processor.

On the other hand, the application provides a using method of the angular contact ball bearing outer ring contact diameter measuring device, which comprises the following steps:

s1: calibrating, namely placing an outer ferrule for calibration on a measuring station, measuring a standard cone and a retainer provided with a measuring ball to move downwards along with a main shaft, applying a measuring load to the main shaft when the measuring ball is in counterpoint contact with the outer ferrule for calibration, and setting a display value of a sensor assembly to be a 0 point when the measuring load is loaded to a target measuring load to finish calibration;

s2: and (3) measuring, namely placing the outer ring to be measured on a measuring station, wherein a measuring standard cone and a retainer provided with a measuring ball move downwards along with a main shaft, and applying a target measuring load to the main shaft when the measuring ball is in alignment contact with the outer ring to be measured, and displaying a measured value by a sensor assembly, wherein the measured value is the difference value between the contact diameter value of the outer ring to be measured and the contact diameter value of the outer ring for calibration.

Compared with the prior art, the application has the following beneficial effects:

the application provides an angular contact ball bearing outer ring contact diameter measuring device, which comprises a measuring platform, wherein a reference plate is arranged above the measuring platform, a main shaft is arranged on the reference plate, one end of the main shaft is rotationally connected with the reference plate, a measuring standard cone and a retainer provided with a measuring ball are arranged at the other end of the main shaft, the main shaft is connected with a driving assembly, the driving assembly can drive the main shaft to reciprocate along the central axis of the main shaft and apply a measuring load to the main shaft, and the main shaft can also be driven to rotate along the central axis; the position of the measuring platform opposite to the main shaft forms a measuring station, the measured outer ferrule is arranged on the measuring station, and the sensor component on the measuring platform can measure and display the difference value between the contact diameter value of the measured outer ferrule and the contact diameter value of the outer ferrule for calibration. Therefore, the angular contact ball bearing outer ring contact diameter measuring device can measure the outer ring contact diameter of a bearing, guarantee actual contact angle detection precision, and can realize direct assembly of the bearing by matching with the bearing inner ring contact diameter, simultaneously guarantee the contact angle of the angular contact ball bearing, reduce the deviation of the actual contact angle and the theoretical contact angle, and guarantee the reliable installation and use of the bearing. Furthermore, the measuring load loaded on the measuring device provided by the application is variable, and the measuring device can adapt to assembly pairing under different pairing loads of the angular contact bearing.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. It should be understood that the specific shape and configuration shown in the drawings should not be considered in general as limiting upon the practice of the present application; for example, based on the technical concepts and exemplary drawings disclosed herein, those skilled in the art have the ability to easily make conventional adjustments or further optimizations for the add/subtract/assign division, specific shapes, positional relationships, connection modes, dimensional scaling relationships, etc. of certain units (components).

FIG. 1 is a schematic view of two sets of angular contact ball bearings mounted back-to-back DB-type;

FIG. 2 is a schematic illustration of a face-to-face DF-type mounting of two sets of angular contact ball bearings;

FIG. 3 is a schematic view of a series DT-type installation of two sets of angular contact ball bearings;

FIG. 4 is a schematic illustration of a TBT type installation of a triple angular contact ball bearing;

FIG. 5 is a schematic illustration of a triple angular contact ball bearing TFT type mounting;

FIG. 6 is a schematic illustration of a TT-type installation of a triple angular contact ball bearing;

FIG. 7 is a schematic view of the principle of measuring the contact diameter of the outer ring of the bearing;

fig. 8 is a schematic structural view of an angular contact ball bearing outer ring contact diameter measuring device provided by the application.

Reference numerals illustrate:

1. a work table; 2. a column; 3. a bolt; 4. a reference plate; 5. a fastening bolt; 6. a guide cylinder liner; 7. an air bearing guide sleeve; 8. a first end cap; 9. an air nozzle; 10. a main shaft; 11. a second end cap; 12. measuring a standard cone; 13. a retainer; 14. an outer ferrule to be measured; 15. a measuring ball; 16. a measurement platform; 17. protecting the supporting point; 18. a limit structure; 19. a fixing seat; 20. a lock nut; 21. a sensor probe.

Detailed Description

The present application is further described in detail below with reference to the attached drawings.

In the description of the present application: unless otherwise indicated, the meaning of "a plurality" is two or more. The terms "first," "second," "third," and the like in this application are intended to distinguish between the referenced objects without a special meaning in terms of technical connotation (e.g., should not be construed as emphasis on degree or order of importance, etc.). The expressions "comprising", "including", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

The terms such as "upper", "lower", "left", "right", "middle", and the like, as referred to in this application, are generally used for convenience in visual understanding with reference to the drawings, and are not intended to be an absolute limitation of the positional relationship in actual products. Such changes in relative positional relationship are considered to be within the scope of the present description without departing from the technical concepts disclosed herein.

Example 1

In order to solve the problem existing in the prior art, the application provides an angular contact ball bearing outer ring contact diameter measuring device. The angular contact ball bearing outer ring contact diameter measuring device can measure the outer ring contact diameter of a bearing, the direct assembly of the bearing can be realized by matching with the bearing outer ring contact diameter, meanwhile, the contact angle of the angular contact ball bearing is guaranteed, the deviation of the actual contact angle and the theoretical contact angle is reduced, and the reliable installation and use of the bearing are guaranteed. Meanwhile, the measuring device provided by the application can measure the diameter of the contact point groove of the outer ring of the bearing, solves the problem that no instrument special for measuring the contact diameter of the outer ring of the bearing exists at home and abroad at present, and fills up the gap of the market. The measuring device is used for measuring the contact diameter of the outer ring of the bearing according to the following measuring principle:

when the angular contact ball bearing works and runs, a certain angle exists between the contact lines of the bearing rolling bodies and the contact points of the inner ring and the outer ring, and the diameter of the contact point of the outer ring is indirectly ensured by controlling the assembly clearance and the diameter of the bottom of the groove of the outer ring during the bearing manufacturing. The measuring principle of the measuring device provided by the application is to simulate the state of a finished bearing after the bearing is assembled, directly measure the contact diameter of the outer ring of the bearing through the standard measuring cone, and measure the half cone angle of the standard cone to be the contact angle of the bearing.

Referring to fig. 7, the principle of measurement of the bearing outer ring contact diameter, which may also be referred to as the groove contact diameter or ring contact diameter of the bearing outer ring, is illustrated. In the figure: d2j is the contact diameter of a measuring standard cone, alpha is the designed contact angle of the bearing, D1j is the contact diameter of the outer ring of the bearing under the contact angle alpha, dw is the diameter of a measuring ball for measurement, D20 is the standard diameter (namely the standard contact diameter of the inner ring), delta is the protruding amount of the bearing, A is the reference surface of the bearing, C is the nominal width of the bearing, and the axial load F _a Wherein there is the following equation relationship:

D2j ＝ D20+2δ/tanα＝D1j -2Dw* cosα (2)

therefore, in the case where Dw and α angle are known, the value of the contact diameter D1j can be indirectly measured as long as the value of D2j is measured.

The structure of the angular contact ball bearing outer ring contact diameter measuring device is described in detail below with reference to the accompanying drawings:

referring to fig. 8, the angular contact ball bearing outer ring contact diameter measuring device provided by the application comprises a measuring platform 16, a reference plate 4 is arranged above the measuring platform 16 at intervals in parallel, a main shaft 10 is installed on the reference plate 4, one end of the main shaft 10 is rotationally connected with the reference plate 4, the other end extends towards the measuring platform 16, a measuring standard cone 12 and a retainer 13 provided with a measuring ball 15 are installed at the end, the main shaft 10 is connected with a driving assembly, and the driving assembly is used for driving the main shaft 10 to reciprocate along the central axis of the main shaft 10 and applying a measuring load to the main shaft 10 and is used for driving the main shaft 10 to rotate along the central axis. The position of the measuring platform 16 opposite to the main shaft 10 forms a measuring station, the measuring station is used for installing the measured outer ring 14, the measuring platform 16 is provided with a sensor assembly, and the sensor assembly is used for measuring and displaying the difference value between the contact diameter value of the measured outer ring 14 and the contact diameter value of the outer ring for calibration. The main shaft 10 is driven by the driving assembly to approach the outer ring 14 to be measured, the measuring standard cone 12 and the retainer 13 are correspondingly arranged with the outer ring 14 to be measured, the measuring ball 15 is abutted with the outer ring 14 to be measured, and the measuring standard cone 12 corresponds to the probe of the sensor assembly. Therefore, through structural design, form the measurement station on the measuring device that this application provided, measurement station top sets up measurement structure, and measurement structure includes main shaft 10 and measurement standard awl 12 and holder 13 that set up on main shaft 10, and measurement standard awl 12 and holder 13 are the standard component, measure the calculation to the measured piece with the standard component as the detection benchmark. When the device is put into use, calibration is needed, and when the instrument is calibrated, the zero point calibration of the sensor is completed by using the outer ferrule for calibration, and the outer ferrule for calibration is also a standard component.

In one embodiment, the reference plate 4 provided by the application is provided with a mounting hole, a guide cylinder sleeve 6 is arranged in the mounting hole, a channel allowing a main shaft 10 to penetrate is formed on the guide cylinder sleeve 6, a circle of groove is formed in the inner wall of the channel, the groove forms a mounting position of an air bearing guide sleeve 7, one end of the main shaft 10 penetrates through the guide cylinder sleeve 6 and then is connected with a first end cover 8, an air bearing is arranged in the first end cover 8, the main shaft 10 is connected with the air bearing, an air nozzle 9 is arranged on the first end cover 8, and the air nozzle 9 is used for jetting pressure air to the air bearing, so that the air bearing and the main shaft 10 rotate. The other end of the main shaft 10 penetrates through the guide cylinder sleeve 6 and then is connected with the measuring standard cone 12 and the retainer 13; the guide cylinder sleeve 6 is connected with a second end cover 11, an air bearing and an air bearing guide sleeve are arranged in the second end cover 11, an air nozzle is arranged on the second end cover 11, and the main shaft 10 penetrates through the second end cover 11 and then is connected with the measuring standard cone 12. Thus, the air bearing provided on the spindle 10 ensures stable rotation of the spindle 10.

In one embodiment, the drive assembly comprises a drive cylinder and an air nozzle 9, the drive cylinder being connected to a spindle 10, the spindle 10 being driven by the drive cylinder to reciprocate along the guide cylinder liner 6, the drive cylinder also being operable to apply a measuring load to the spindle 10.

In one embodiment, one end of the main shaft 10 forms a step structure for installing a measuring standard cone 12 and a retainer 13, the measuring standard cone 12 is a round table-shaped structural member, a through hole which is installed in a matching way with the main shaft 10 is formed in the center position of the measuring standard cone 12, the retainer 13 is installed on the outer wall of the measuring standard cone 12, and the retainer 13 is used for installing and limiting a plurality of measuring balls 15 installed on the retainer 13; and a limiting structure 18 is arranged at a position close to the end part of the step structure, and the limiting structure 18 is used for realizing the installation limiting of the measuring standard cone and the retainer.

In one embodiment, the measuring station is provided with a groove which corresponds to the main shaft 10, and when the measuring standard cone 12 and the retainer 13 are arranged on the outer ring 14 to be measured, the end part of the main shaft 10 extends into the groove and is spaced from the groove bottom; the bottom of the groove forms a through hole for installing a probe of the sensor, the through hole corresponds to the end part of the main shaft 10, and the sensor probe 21 is fixedly connected with the measuring platform 16 through a locking nut 20.

In one embodiment, the measuring platform 16 is provided with a mounting position for mounting the protection supporting point 17 at a position close to the groove wall, and when the end of the measuring standard cone 12 is abutted against the surface of the measuring platform 16, the end of the measuring standard cone 12 is correspondingly connected with the protection supporting point 17. The protecting pivot 17 may be a metal screw fastened on the measuring platform, but may also be other metal pieces that may play a supporting protecting role.

In one embodiment, the central axis of the spindle 10 is perpendicular to the surface of the measurement platform 16. The measuring platform 16 is arranged on the workbench 1, a plurality of upright posts 2 are arranged on the workbench 1, and the upright posts 2 erect the datum plate 4 above the measuring platform 16.

In one embodiment, the sensor assembly includes a sensor probe 21, a processor coupled to the sensor probe 21, and a display coupled to the processor. The sensor assembly is mainly used for displaying the difference value between the contact diameter value of the measured outer ring 14 and the contact diameter value of the outer ring for calibration. The structural connection of the sensor assembly provided by the application can be adaptively installed according to the connection of the conventional sensor probe 21, the processor and the display.

The device for measuring the contact diameter of the outer ring of the angular contact ball bearing can measure the contact diameter of the outer ring of the bearing, can realize direct assembly of the bearing by matching with the contact diameter of the inner ring of the bearing, simultaneously ensures the contact angle of the angular contact ball bearing, reduces the deviation between the actual contact angle and the theoretical contact angle, and ensures the reliable installation and use of the bearing. Furthermore, the measuring load loaded on the measuring device provided by the application is variable, and the measuring device can adapt to assembly pairing under different pairing loads of the angular contact bearing.

Example two

Based on the angular contact ball bearing outer ring contact diameter measuring device provided above, the embodiment provides a use method of the angular contact ball bearing outer ring contact diameter measuring device. When the measuring device is put into use, the calibration is needed, so that the error can be reduced, and the detection precision and accuracy are improved.

The angular contact ball bearing outer ring contact diameter measuring device adopts a relative measuring method, and before measurement, a standard component (an outer ring for calibration) is used for zero calibration of a sensor, and then the contact diameter of the measured outer ring is measured.

(1) Calibrating an instrument:

the main shaft 10 is in an upper state under the action of an air cylinder before calibration, a standard component for calibration (namely an outer ferrule for calibration) is placed on a measurement platform, a measurement standard cone 12 (cone half angle is a bearing contact angle) and a measurement ball 15 (as an assembly ball) which are installed on the main shaft 10 move along with the main shaft to be close to a measurement station under the action of a driving air cylinder, the main shaft 10 rotates under the action of an air nozzle 9, the measurement ball 15 correctly enters the measurement station, then a target measurement load is applied to the measurement main shaft 10, the display value of a sensor component at the moment is set to be a point of 0, and the calibration of the instrument is completed.

(2) Measurement of bearing outer ring contact diameter:

the main shaft 10 is in an upper state under the action of an air cylinder before measurement, the measured outer ring 14 is placed on a measuring platform, a measuring standard cone 12 (cone half angle is a bearing contact angle) and a measuring ball 15 (as an assembling ball) which are arranged on the main shaft 10 move along with the main shaft to be close to a measuring station under the action of a driving air cylinder, the main shaft 10 rotates under the action of an air nozzle 9, the measuring ball 15 correctly enters the measuring station, then a target measuring load is applied to the measuring main shaft 10, and a sensor assembly displays a measured value m which is the difference value between the contact diameter value of the measured outer ring and the contact diameter value of the outer ring for calibration.

Any combination of the technical features of the above embodiments may be performed (as long as there is no contradiction between the combination of the technical features), and for brevity of description, all of the possible combinations of the technical features of the above embodiments are not described; these examples, which are not explicitly written, should also be considered as being within the scope of the present description.

The foregoing has outlined and detailed description of the present application in terms of the general description and embodiments. It should be appreciated that numerous conventional modifications and further innovations may be made to these specific embodiments, based on the technical concepts of the present application; but such conventional modifications and further innovations may be made without departing from the technical spirit of the present application, and such conventional modifications and further innovations are also intended to fall within the scope of the claims of the present application.

Claims (10)

1. The measuring device is characterized by comprising a measuring platform, wherein a reference plate is arranged above the measuring platform at intervals in parallel, a main shaft is arranged on the reference plate, one end of the main shaft is rotationally connected with the reference plate, the other end of the main shaft extends towards the measuring platform, a measuring standard cone and a retainer provided with a measuring ball are arranged at the end part of the main shaft, the main shaft is connected with a driving assembly, and the driving assembly is used for driving the main shaft to reciprocate along the central axis of the main shaft and applying a measuring load to the main shaft and driving the main shaft to rotate along the central axis of the main shaft;

the measuring platform is provided with a sensor assembly for measuring and displaying the difference value between the contact diameter value of the measured outer ring and the contact diameter value of the outer ring for calibration;

the main shaft is driven by the driving assembly to approach the outer ring to be measured, the measuring standard cone and the retainer are correspondingly arranged with the outer ring to be measured, the measuring ball is abutted with the outer ring to be measured, and the measuring standard cone corresponds to the probe of the sensor assembly.

2. The angular contact ball bearing outer race contact diameter measurement device according to claim 1, wherein a mounting hole is formed in the reference plate, a guide cylinder sleeve is arranged in the mounting hole, a channel allowing a main shaft to penetrate is formed in the guide cylinder sleeve, a circle of groove is formed in the inner wall of the channel, the groove forms a mounting position of an air bearing guide sleeve, one end of the main shaft penetrates through the guide cylinder sleeve and then is connected with a first end cover, an air bearing is mounted in the first end cover, the main shaft is connected with the air bearing, an air nozzle is arranged on the first end cover, and the air nozzle is used for jetting pressure air to the air bearing, so that the air bearing rotates with the main shaft.

3. The angular contact ball bearing outer ring contact diameter measuring device according to claim 2, wherein the other end of the main shaft penetrates through the guide cylinder sleeve and then is connected with the measuring standard cone and the retainer; the guide cylinder sleeve is connected with a second end cover, an air bearing and an air bearing guide sleeve are arranged in the second end cover, an air nozzle is arranged on the second end cover, and the main shaft penetrates through the second end cover and then is connected with the measuring standard cone.

4. An angular contact ball bearing outer race contact diameter measurement device according to claim 3, wherein the drive assembly includes a drive cylinder and an air nozzle, the drive cylinder being connected to the spindle, the spindle being reciprocally movable along the guide cylinder liner by the drive cylinder.

5. The angular contact ball bearing outer ring contact diameter measuring device according to claim 1, wherein one end of the main shaft is provided with a step structure for installing the measuring standard cone and a retainer, the measuring standard cone is a round table-shaped structural member, a through hole which is matched with the main shaft is formed in the center position of the measuring standard cone, the retainer is installed on the outer wall of the measuring standard cone, and the retainer is used for installing and limiting a plurality of measuring balls installed on the retainer;

the end part of the step structure is provided with a limiting structure, and the limiting structure is used for realizing the installation limiting of the measuring standard cone and the retainer.

6. The angular contact ball bearing outer ring contact diameter measuring device according to claim 5, wherein the measuring station is provided with a groove, the groove corresponds to a main shaft, and when the measuring standard cone and the retainer are installed on the measured outer ring, the end part of the main shaft extends into the groove and is spaced from the groove bottom; the bottom of the groove forms a through hole for installing a probe of the sensor, the through hole corresponds to the end part of the main shaft, and the probe of the sensor assembly is fixedly connected with the measuring platform through a locking nut.

7. The device for measuring the contact diameter of the outer ring of the angular contact ball bearing according to claim 6, wherein a mounting position for mounting a protection fulcrum is formed on the measuring platform at a position close to the groove wall of the groove, and when the end part of the measuring standard cone is abutted against the surface of the measuring platform, the end part of the measuring standard cone is correspondingly connected with the protection fulcrum;

the protective fulcrum comprises a metal screw.

8. The angular contact ball bearing outer ring contact diameter measurement device according to claim 1, wherein a central axis of the main shaft is perpendicular to a surface of the measurement platform;

the measuring platform is arranged on the workbench, a plurality of stand columns are arranged on the workbench, and the stand columns are connected with the reference plate.

9. The angular contact ball bearing outer ring contact diameter measurement device of claim 1, wherein the sensor assembly comprises a sensor probe, a processor coupled to the sensor probe, and a display coupled to the processor.

10. A method of using the angular contact ball bearing outer ring contact diameter measurement device of claim 1, comprising the steps of:

s1: calibrating, namely placing an outer ferrule for calibration on a measuring station, measuring a standard cone and a retainer provided with a measuring ball to move downwards along with a main shaft, applying a measuring load to the main shaft when the measuring ball is in counterpoint contact with the outer ferrule for calibration, and setting a display value of a sensor assembly to be a 0 point when the measuring load is loaded to a target measuring load to finish calibration;

s2: and (3) measuring, namely placing the outer ring to be measured on a measuring station, wherein a measuring standard cone and a retainer provided with a measuring ball move downwards along with a main shaft, and applying a target measuring load to the main shaft when the measuring ball is in alignment contact with the outer ring to be measured, and displaying a measured value by a sensor assembly, wherein the measured value is the difference value between the contact diameter value of the outer ring to be measured and the contact diameter value of the outer ring for calibration.